The regular slotted head is ideal made use of having a flat screwdriver, although the cross-formed indention is best suited to some Phillips screwdriver. A Robertson screw provides a sq.-shaped indention and requires a matching driver head. This bolt, together with the machine screw that goes with it, sits on https://woodscrews10863.tokka-blog.com/28912039/little-known-facts-about-screws